Which of the following is a chemical change?

Chemistry

1 answer:

monitta3 years ago

5 0

Answer: C: A burning candle

Explanation:

C is a Combustion reaction and this is a chemical change.

The rest are physical changed because they are only changing state.

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juin [17]

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5 0

3 years ago

Which is an example of a double

Ostrovityanka [42]

Answer:

NaCl + AgF → NaF + AgCl

Explanation:

A double replacement reaction is a type of chemical reaction that occurs when two reactants exchange cations or anions to yield two new products.

From all the reactions given ,

2Na + Cl₂ → 2NaCl is an example of combination reaction because two or more reactants (Na & Cl₂) react with each other to form a single product (NaCl)

H₂SO₃ → H₂O + SO₂ is an example of decomposition reaction because a single reactant (H₂SO₃) breaks down into two or more products (H₂O & SO₂).
2K + 2H₂O → 2KOH + H₂ is an example of displacement reaction because a highly reactive element (K) displaces a least reactive element (H) from its compound (H₂O).

NaCl + AgF → NaF + AgCl is an example of double replacement reaction because there's an exchange between Cations ( $Na^+$ & $Ag^{+}$ ) and Anions ( $Cl^-$ & $F^-$ ).